doomath Calculator
P-Value Calculator
Estimate a two-sided p-value from a z statistic using the standard normal distribution.
InputsChange a value to recalculate instantly
ResultUpdates as you type
How it worksTransparent math
Formula
p=2(1−Φ(|z|))Estimates a two-sided normal-approximation p-value from a z statistic.
Result breakdownSee the important numbers together
1Two-sided p-value0.05
2|z|1.96
λ DooMathWork with this calculation
Local · deterministic · optionalQuick mathNatural-language-style shortcuts for deterministic arithmetic.
Calculator guide
How to use the P-Value Calculator
Estimate a two-sided p-value from a z statistic using the standard normal distribution.
01Set inputsChoose values, units and assumptions.
02Apply the modelp = 2(1−Φ(|z|))
03Read the resultCheck the output against the assumptions before using it.
What this calculator does
Estimate a two-sided p-value from a z statistic using the standard normal distribution.
Formula & method
p = 2(1−Φ(|z|))
Assumptions & notes
Review the inputs, units and assumptions before using the result for a real decision.